Text Diff Checker

Compare text files and strings online instantly. Secure, private, and fast.

No Data Stored
100% Client-Side
Free Forever

Text Diff & Compare

Compare two text blocks side-by-side to find differences instantly.

Enter text above to see the comparison.

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Why use our Diff Tool?

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Instant Comparison

See differences highlighted immediately as you type. No need to click a 'Compare' button.

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Line & Word Modes

Switch between comparing entire lines (great for code) or individual words (great for prose).

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Secure & Private

All diffing happens directly in your browser. Your sensitive text is never sent to a server.

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Swap Inputs

Easily swap the original and modified text inputs with a single click.

What is a Text Diff Tool?

A text diff (difference) tool is a utility that compares two blocks of text or code and visually highlights exactly what has been added, removed, or modified between the two versions.

How to Compare Text

Paste the original text into the left panel and the updated text into the right panel. The tool will calculate the differences and highlight them using standard color coding: red for deletions and green for additions.

Frequently Asked Questions

What is a diff tool?

A diff (difference) tool analyzes two pieces of text and highlights exactly what was added, removed, or changed. It's incredibly useful for finding small typos in large code files or seeing what changed in a legal document.

What is the difference between Line Diff and Word Diff?

Line Diff compares text line-by-line, highlighting entire rows that changed. Word Diff is more granular, highlighting the specific words or characters that changed within a sentence.

Does this work for code?

Yes! While we have specific tools for JSON comparison, this Text Diff tool works perfectly for comparing generic code snippets, configuration files, or logs.

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